C01C 1/04
Preparation of ammonia by synthesis
Official title: Preparation of ammonia by synthesis (preparation or purification of gas mixtures for ammonia synthesis C01B3/025)
C01C1/04 (Preparation of ammonia by synthesis) appears on 754 US grants and 846 published applications in this corpus.
Search patents in C01C- Granted patents
- 754
- Published applications
- 846
- Assignees
- 394
- Inventors
- 1,685
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 13 | 0 |
| 1980 | 14 | 0 |
| 1981 | 14 | 0 |
| 1982 | 14 | 0 |
| 1983 | 12 | 0 |
| 1984 | 12 | 0 |
| 1985 | 14 | 0 |
| 1986 | 10 | 0 |
| 1987 | 15 | 0 |
| 1988 | 19 | 0 |
| 1989 | 16 | 0 |
| 1990 | 14 | 0 |
| 1991 | 5 | 0 |
| 1992 | 11 | 0 |
| 1993 | 10 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 9 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 14 | 5 |
| 2002 | 9 | 8 |
| 2003 | 5 | 5 |
| 2004 | 10 | 12 |
| 2005 | 7 | 6 |
| 2006 | 12 | 10 |
| 2007 | 4 | 10 |
| 2008 | 3 | 13 |
| 2009 | 7 | 9 |
| 2010 | 13 | 16 |
| 2011 | 10 | 22 |
| 2012 | 7 | 23 |
| 2013 | 6 | 13 |
| 2014 | 17 | 47 |
| 2015 | 20 | 35 |
| 2016 | 30 | 31 |
| 2017 | 24 | 40 |
| 2018 | 31 | 36 |
| 2019 | 38 | 40 |
| 2020 | 26 | 53 |
| 2021 | 38 | 57 |
| 2022 | 23 | 57 |
| 2023 | 36 | 62 |
| 2024 | 41 | 90 |
| 2025 | 38 | 98 |
| 2026 | 34 | 48 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Autonomous modular flare gas conversion systems and methods6 Oct 2026US 12,753,138 B2M2X Energy Inc.
- Nuclear reactor integrated oil and gas production systems and methods of operation6 Oct 2026US 12,753,674 B2Natura Resources LLC
- Ruthenium promoter catalyst compositions15 Sep 2026US 12,735,324 B2Commonwealth Scientific and Industrial Research Organisation
- Purge gas conditioning of NH3 plants15 Sep 2026US 12,735,325 B2Stamicarbon B. V.
- Ammonia manufacturing apparatus and ammonia manufacturing method1 Sep 2026US 12,723,315 B2Kabushiki Kaisha Toshiba
- Systems and methods for the production of ammonia8 Oct 2026US 2026/0308000 A1The Mosaic Company
- Ammonia Synthesis Converter and Method for Small Production Units8 Oct 2026US 2026/0308001 A1AmmPower America LLC
- Autonomous Modular Flare Gas Conversion Systems and Methods8 Oct 2026US 2026/0308093 A1M2X Energy Inc.
- Method for producing low-carbon ammonia from natural gas1 Oct 2026US 2026/0296905 A1Publichnoe Aktsionernoe Obshchestvo "NOVATEK"
- Copper-phosphorus/cobalt foam composite catalyst and preparation method thereof1 Oct 2026US 2026/0297770 A1Southwest Petroleum University
Most cited
By later US patents
- Apparatus for on-site production of nitrate ions409US 7,514,058 B1The Lata Group, Inc. · 2009
- Methanol plant retrofit for acetic acid manufacture208US 6,232,352 B1Acetex limited · 2001
- Composite hydrogen separation element and module185US 5,498,278 ABend Research, Inc. · 1996
- Composite hydrogen separation element and module164US 5,645,626 ABend Research, Inc. · 1997
- Nanotechnology for engineering the performance of substances140US 6,531,704 B2NanoProducts Corporation · 2003